package:web v1.1.0

• Added HttpStatus class that declares http status codes. This is a copy of
  the HttpStatus from the dart:_internal library that's exposed only through
  dart:io and dart:html.
• Added JSImmutableListWrapper which helps create a dart list from a JS list.
• Deprecated TouchListWrapper and TouchListConvert in favor of
  JSImmutableListWrapper.
• Added [] and []= overloaded operators to types which define unnamed
  getters and setters, respectively.
• Exposed constants with primitive values as non-external so they can be
  switched over.
• Add an extension responseHeaders to XMLHttpRequest.
• Correctly namespace WebAssembly types.
• Added CrossOriginWindow and CrossOriginLocation wrappers for cross-origin
  windows and locations, respectively, that can be accessed through
  HTMLIFrameElement.contentWindowCrossOrigin, Window.openCrossOrigin,
  Window.openerCrossOrigin, Window.topCrossOrigin,
  and Window.parentCrossOrigin.